Patents Assigned to Huls AG
  • Pulverulent polyamide mixture coating composition wherein the polyamide has as an average at least nine carbon atoms per carbonamide group
    Patent number: 5070156
    Abstract: Pulverulent polyamide coating compositions consisting of a mixture of similar polyamides having on the average at least nine aliphatically bound carbon atoms per carbonamide group and of different relative viscosity, the difference in relative viscosities amounting to at least 0.04 and at most 0.1 units.The mixtures are obtained by mixing powders prepared both by precipitation or by cold grinding or also by mixing the corresponding granulates which subsequently are then cold ground.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: December 3, 1991
    Assignee: Huls AG
    Inventors: Rainer Feldmann, Gunter Hess
  • Method for preparing asymmetric aliphatic ketones
    Patent number: 5001273
    Abstract: A process for preparing asymmetric ketones by using a catalyst containing cerium oxide on an aluminum oxide support where the asymmetric ketones are prepared from carboxylic acid mixture at high conversions and good selectivity. The asymmetric ketones produced are for instance methyl-ethyl-ketone, ethyl-butyl-ketone, methyl-isopropyl-ketone or methyl-octyl-ketone.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: March 19, 1991
    Assignee: Huls AG
    Inventor: Walter Kleine-Homann
  • Agitator vessel with radially conveying agitator and with at least one baffle, as well as process for the thorough mixing of liquids with the aid of this agitator vessel
    Patent number: 4984899
    Abstract: An agitator vessel is equipped with a radially conveying agitator and with at least one baffle, for the thorough mixing of liquids, the at least one baffle has the shape of an airfoil profile and is arranged below the level of liquids and above the blades of the agitator.The agitator vessel is equipped with a radially conveying agitator 3 and at least one baffle 2, the latter having the shape of an airfoil profile.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: January 15, 1991
    Assignee: Huls AG
    Inventors: Franz-Michael Bollenrath, Josef K. Rigler
  • Process for producing alkylidene compounds and arylidene compounds
    Patent number: 4808747
    Abstract: Alkylidene compounds and arylidene compounds are prepared by reacting the corresponding CH-acidic compounds with carbonyl compounds in the presence of a catalyst comprising a metal compound of a metal of Groups IIA, IIIA, IVA, IB, IIB, VIB, VIIB, or VIIIB of the periodic table of elements. The rate of reaction is increased by adding 1 to 40% water referred to the weight of catalyst used.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: February 28, 1989
    Assignee: Huls AG
    Inventor: Walter K. Homann
  • Pulverulent polyamide coating compositions wherein the polyamide has as an average at least nine carbon atoms per carbonamide group
    Patent number: 4661585
    Abstract: Pulverulent polyamide coating compositions consisting of a mixture of similar polyamides having on the average at least nine aliphatically bound carbon atoms per carbonamide group and of different relative viscosity, the difference in relative viscosities amounting to at least 0.04 and at most 0.1 units.The mixtures are obtained by mixing powders prepared both by precipitation or by cold grinding or also by mixing the corresponding granulates which subsequently are then cold ground.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: April 28, 1987
    Assignee: Huls AG
    Inventors: Rainer Feldmann, Gunter Hess